kb5077797

Windows 11 users and administrators woke up in mid‑January to a puzzling and disruptive problem: after applying Microsoft’s January cumulative update some PCs refused to power off cleanly. Instead of shutting down or reliably entering hibernation, affected systems often restarted or remained...

A routine Windows security update should not leave machines refusing to power off. Yet in mid‑January a cumulative package for Windows 11 created a nasty, configuration‑dependent bug: on some systems the Shutdown and Hibernate commands were ignored and the PC simply restarted. That regression...

Microsoft has issued an out‑of‑band fix after a January update left a small subset of Windows 11 systems unable to shut down or enter hibernation — affected machines would restart instead of powering off — and the remedial package, KB5077797, is now available from Microsoft (and the Microsoft...

Microsoft’s first Windows 11 update of 2026 disrupted shutdown behavior on a narrow but important slice of devices and forced an out‑of‑band emergency fix hours later; the January 13 Patch Tuesday cumulative (notably KB5073455 for Windows 11 23H2) introduced a configuration‑dependent regression...

Microsoft’s January update cycle took an unexpected detour this week when a Patch Tuesday release introduced a narrowly scoped but disruptive regression that left some Windows 11 systems unable to shut down or enter hibernation, forcing Microsoft to ship emergency out‑of‑band (OOB) updates on...

Microsoft has pushed an emergency, out‑of‑band fix after a January cumulative update for Windows 11 caused some systems configured with System Guard Secure Launch to restart instead of shutting down or entering hibernation, an issue Microsoft has acknowledged and patched with a remedial package...

Microsoft’s January Patch Tuesday brought a familiar trade‑off: a broad security rollup that closed dozens of vulnerabilities — and, for a narrowly defined set of systems, an unexpected regression that prevents shutdown and hibernation from completing as intended. The bug, tied to the Windows 11...

Microsoft’s January Windows 11 cumulative update left a narrow but disruptive footprint: on some devices running Windows 11, version 23H2 with System Guard Secure Launch enabled, the system may restart instead of powering off or entering hibernation — and Microsoft published an emergency...